Every disease is easier to prevent than to cure. Keep an eye on your plants regularly to notice any problems emerging.
1. Provide good air circulation for your plants. Make sure that all of them have enough space. Sometimes, an oscillating fan is a good option.
2. Develop good watering habits. Check the soil moist level with your finger - if at least 2” down the soil is still moist, there is no need to water right now.
3. Better water your houseplant in the water, not in the evening. It is harder for soil to dry out at night.
4. Arrange a good drainage system so that a plant doesn’t get overlooked.
5. If you suspect your plant of having fungus infection, spray it with a homemade solution of baking soda and water. This will disrupt the fungal cells ion balance. Be careful - too much baking soda will burn the leaves. Mix 1 teaspoon of baking soda to 1 gallon of water.